Jessica Chastain - Oscars 2012 Red Carpet
The actress, who brought along her grandma Marilyn as her date, rocked an Alexander McQueen dress with Harry Winston jewels!
Tonight, Jessica is nominated as Best Supporting Actress for her work in The Help.
Jessica found out about her nomination while at Paris Fashion Week!
Billy Crystal hosts the 2012 Oscars live TONIGHT at 8:30 p.m. ET/5:30 p.m. PT on ABC!